causal_graph_builder · DoWhy MCP v2 0 MCP: Risk & Policy

WHAT IT DOES

What causal_graph_builder does on DoWhy MCP v2 0

AI agents use causal_graph_builder to create or update resources in DoWhy MCP v2 0 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your DoWhy MCP v2 0 environment.

WHY IT NEEDS A POLICY

Why causal_graph_builder needs a policy

The tool builds or constructs causal graphs—creating new analytical models/data structures. This is a reversible creation operation (Write category), not merely reading existing data (Read).

From the tool's definition Tool name 'causal_graph_builder' and description '使用 DoWhy 构建因果图' (build causal graph using DoWhy) indicate the tool creates or constructs causal graph models. This is a data creation/modification operation without destructive consequences.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

causal_graph_builder Rate-limited

causal_graph_builder stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "causal_graph_builder": {
      "limits": [
        {
          "counter": "causal_graph_builder_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches DoWhy MCP v2 0, so you can run agents against it safely.

FAQ

Questions about causal_graph_builder

What does the causal_graph_builder tool do? +

使用 DoWhy 构建因果图. It is categorised as a Write tool in the DoWhy MCP v2 0 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on causal_graph_builder? +

Register the DoWhy MCP v2 0 MCP server in PolicyLayer and add a rule for causal_graph_builder: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches DoWhy MCP v2 0. Nothing to install.

What risk level is causal_graph_builder? +

causal_graph_builder is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit causal_graph_builder? +

Yes. Add a rate_limit block to the causal_graph_builder rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block causal_graph_builder completely? +

Set action: deny in the PolicyLayer policy for causal_graph_builder. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides causal_graph_builder? +

causal_graph_builder is provided by the DoWhy MCP v2 0 MCP server (lesong36/dowhy_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.